Petroleum drilling mud treatment system

Abstract

The invention relates to the technical field of mud dehydration, in particular to a petroleum drilling mud treatment system. Comprising a dehydration kettle, the dehydration kettle comprises a kettle body, and a kettle cover is fixedly mounted at the upper end of the kettle body; a stirring rod is arranged in the kettle body; the stirring rod is rotationally connected with the kettle cover; through the arrangement of the liquid discharging barrel and the pressing plate, the pressing plate can extrude petroleum-containing liquid on the upper layer in mud and a middle water phase layer to flow to the position above the pressing plate through the liquid filtering opening, then the pressing plate pushes petroleum-containing mixed liquid on the upper portion to rise, the mixed liquid flows into the liquid discharging barrel along the upper end opening of the dewatering barrel to be discharged, and therefore a liquid pumping pipe does not need to be used; petroleum drilling mud is prevented from flowing backwards into the liquid pumping pipe through the lower end opening of the liquid pumping pipe, so that the petroleum drilling mud in the dewatering barrel can be fully combined with a flocculating agent, sludge in the mud can be rapidly flocculated into clustered floccules, and the mud-water separation efficiency in the mud is improved; therefore, the treatment efficiency of the petroleum drilling mud is improved.

Description

Technical Field

[0001] The invention relates to the technical field of mud dehydration, in particular to a petroleum drilling mud processing system. Background Art

[0002] During the extraction and storage of oil, a large amount of mud with high petroleum hydrocarbon content is produced. The mud mainly contains clay, weighting materials, drill cuttings, sewage, dirty oil and various chemical additives. The hydrocarbons, salts, various polymers, and heavy metal ions such as mercury, copper, arsenic, chromium, zinc, and lead are important sources of pollution. If not properly handled, they will have a serious impact on the soil, vegetation, groundwater, surface water, farmland, etc. around the well site. At present, the main treatment method for drilling waste mud is to first screen the oil drilling mud to remove particles such as sand and gravel, and then add a curing agent to the oil drilling mud for curing treatment to obtain the required oil sludge. The treatment methods of oil sludge can be divided into physical methods, chemical methods and biological methods. Among them, physical methods include landfill, hot alkaline water washing, concentration and drying methods; chemical methods include incineration, pyrolysis, thermal desorption and other methods; biological methods include biological land cultivation, biological flotation, etc. Some technical solutions for oil drilling mud treatment devices have also appeared in the prior art. For example, a Chinese patent with publication number CN220467795U discloses an oil drilling waste mud treatment device, a protective shell, a recovery mechanism is arranged inside the protective shell, a discharge mechanism is arranged on the top of the protective shell, the recovery mechanism includes a recovery tank, a feed pipe is fixedly connected to the upper surface of the recovery tank, a discharge pipe is fixedly connected to the lower surface of the recovery tank, and a limited support plate is rotatably connected to the bottom of the recovery tank. A limiting ring fixedly connected to the protective shell is arranged above the limiting support plate, and a plurality of limiting rings are arranged on the lower surface of the limiting ring for cooperating with the limiting support plate to adjust the recovery. The first height adjustment member of the tank plays a role in height adjustment, and a plurality of second mixing blocks are arranged on the inner wall of the recovery tank; the utility model has a simple structure and is easy to use. When in use, the waste mud and the flocculant are fully mixed through the cooperation of multiple structures, thereby improving the recovery effect of the petroleum component in the waste mud; however, because the pumping pipe is always located in the recovery mechanism, when the liquid level of the oil drilling mud is higher than the pipe opening at the lower end of the pumping pipe, the oil drilling mud will flow back from the lower end of the pumping pipe into the inside of the pumping pipe, resulting in the oil drilling mud flowing back into the inside of the pumping pipe being unable to be effectively mixed with the flocculant, thereby reducing the de-oiling and dehydration effect of the technical solution on the mud; In addition, after adding flocculants to the oil drilling mud, stratification will occur. The substances that settle from top to bottom include the upper layer of oil-containing liquid, the middle water phase layer and the lower layer of solid sediments; and the middle water phase layer often contains fine solid particles and floccules; when the user uses the pumping pipe to draw in oil and water, the solid particles and floccules in the middle water phase layer will enter the pumping pipe and accumulate in the pipe of the pumping pipe, thereby causing the pumping pipe to be blocked, which in turn affects the pumping pipe's ability to effectively discharge the separated oil and water; In view of this, in order to overcome the above technical problems, the present invention proposes an oil drilling mud processing system to solve the above technical problems. Summary of the invention

[0003] In order to make up for the shortcomings of the prior art, the present invention proposes an oil drilling mud processing system. The present invention arranges a drainage barrel and a pressure plate so that the pressure plate can squeeze the upper layer of oil-containing liquid and the middle water phase layer in the mud to flow to the top of the pressure plate through the filtrate port, and then the pressure plate pushes the upper oil-containing mixed liquid to rise, so that the mixed liquid flows into the drainage barrel along the upper port of the dewatering barrel and is discharged, thereby eliminating the need to use a suction pipe, avoiding the oil drilling mud from flowing back into the inside of the suction pipe through the lower port of the suction pipe, so that the oil drilling mud in the dewatering barrel can be fully combined with the flocculant, and the sludge in the mud can be quickly flocculated into agglomerated floccules, thereby accelerating the efficiency of mud-water separation in the mud; thereby improving the processing efficiency of the oil drilling mud.

[0004] The technical solution adopted by the present invention to solve the technical problem is: the oil drilling mud processing system described in the present invention includes a dehydration kettle, and the dehydration kettle includes: A kettle body, a kettle cover is fixedly installed on the upper end of the kettle body; a stirring rod is arranged inside the kettle body; the stirring rod is rotatably connected to the kettle cover; a driving motor is fixedly installed on the upper end of the kettle cover; the driving motor is used to drive the stirring rod to rotate; a feed inlet is provided at the upper end of the kettle body; a discharge port is provided at the lower end of the kettle body, A dehydration barrel, which is located inside the kettle body; the dehydration barrel is fixedly installed at the lower end of the kettle body through a hydraulic push rod; the stirring rod is located in the dehydration barrel; the dehydration barrel is connected to the discharge port through a No. 1 connecting pipe; a drainage barrel is fixedly connected to the outer wall of the dehydration barrel; a drainage port is provided at the bottom of the drainage barrel; a pipe connected to the drainage port is installed on the side wall of the kettle body; the drainage port and the pipe are connected through a No. 2 connecting pipe; a pressure plate is connected to the inside of the dehydration barrel in a sliding and sealing manner; a filtrate port is provided on the surface of the pressure plate; a float valve is slidably connected in the filtrate port; a filter cloth is fixedly installed on the side of the pressure plate away from the kettle cover; the stirring rod is rotatably sealed and connected to the pressure plate; a through groove is provided at the upper end of the pressure plate; the through groove is connected to the feed port through a No. 3 connecting pipe; solenoid valves are fixedly installed in the through groove, the drainage port and the discharge port.

[0005] Preferably, a swivel is provided between the stirring rod and the pressure plate; the stirring rod is connected to the swivel in a sliding and sealing manner; the swivel is connected to the pressure plate in a rotational and sealing manner; a slot is provided on the surface of the stirring rod; an insertion rod is connected in a sliding and sealing manner in the slot; the insertion rod is fixed to the bottom of the slot by a supporting spring; a slot matching the insertion rod is provided on the inner ring wall of the swivel; an electromagnetic sheet is inlaid on the bottom of the slot; a magnet is inlaid on one end of the insertion rod close to the bottom of the slot.

[0006] Preferably, an L-shaped block is rotatably connected to the upper end of the dehydration barrel; a rectangular groove is opened on the inner wall of the dehydration barrel; a rectangular block is slidably and sealingly connected in the rectangular groove; the rectangular block is connected to the bottom of the rectangular groove by a fixed spring.

[0007] Preferably, a threaded groove is provided on one side of the pressing plate away from the kettle cover; a clamping plate is rotatably connected in the threaded groove; and the clamping plate is used to clamp the filter cloth.

[0008] Preferably, the clamp includes a lower base plate and an upper clamping ring; the upper clamping ring is threadedly connected to the lower base plate; the upper clamping ring is threadedly connected in a thread groove; a connecting hole is provided on the upper end surface of the lower base plate; an expansion block is slidingly and sealingly connected in the connecting hole; a fixing ring is provided above the lower base plate; the expansion block is fixedly connected to the lower end surface of the fixing ring.

[0009] Preferably, a corrugated airbag is arranged inside the kettle body; an air inlet connected to an external delivery pump is provided on the surface of the corrugated airbag; the external delivery pump is used to deliver flocculant; one end of the corrugated airbag is fixedly connected to the drainage barrel, and the other end is fixedly connected to the inner wall of the kettle body; an airway is provided inside the kettle body; one end of the airway is connected to the corrugated airbag, and the other end passes through the upper end surface of the kettle body; a circular groove is provided on the lower end surface of the kettle cover; the stirring rod is rotatably sealed and connected in the circular groove; an air hole is provided on the lower end surface of the stirring rod; an annular groove is provided on the surface of the stirring rod; one end of the stirring rod having the annular groove is located in the circular groove; the air hole is connected with the circular groove through the annular groove; an air cavity opposite to the airway is provided on the lower end surface of the kettle cover; the end of the air cavity away from the airway is connected to the circular groove; and a one-way valve is fixedly installed in the air inlet and the air hole.

[0010] Preferably, one end of the air cavity away from the circular groove is threadedly connected with a cannula; and one end of the cannula away from the air cavity is slidably and sealingly connected in the airway.

[0011] Preferably, one end of the airway away from the corrugated airbag is slidably sealed and connected with a sealing plug; the sealing plug is connected to the inner wall of the airway via a connecting spring; and the cross-sectional shape of the cannula is set to be a trapezoid.

[0012] The beneficial effects of the present invention are as follows: 1. The present invention arranges a liquid discharge barrel and a pressure plate so that the pressure plate can squeeze the upper petroleum-containing liquid and the middle water phase layer in the mud to flow to the top of the pressure plate through the filtrate port, and then the pressure plate pushes the upper petroleum-containing mixed liquid to rise, so that the mixed liquid flows into the liquid discharge barrel along the upper port of the dewatering barrel and is discharged, thereby eliminating the need to use a liquid suction pipe, preventing the oil drilling mud from flowing back into the inside of the liquid suction pipe through the lower port of the liquid suction pipe, so that the oil drilling mud in the dewatering barrel can be fully combined with the flocculant, and the sludge in the mud can be quickly flocculated into agglomerated floccules, thereby accelerating the efficiency of mud-water separation in the mud; thereby improving the treatment efficiency of the oil drilling mud.

[0013] 2. The filter cloth of the present invention is detachable and replaceable, so that the filter cloth can be replaced regularly to prevent the filter cloth pores from being blocked and affecting the filtering effect of the filter cloth; to ensure that the liquid in the mud can quickly pass through the filtrate port, accelerate the discharge speed of the liquid in the mud, and thus accelerate the dehydration efficiency of the mud of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described below in conjunction with the accompanying drawings and implementation modes.

[0015] Figure 1 is a stereogram of the present invention; Figure 2 It is a schematic diagram of the structure of the present invention; Figure 3 yes Figure 2 The enlarged view of point A in the middle; Figure 4 It is a schematic diagram of the structure of the kettle body used in the present invention; Figure 5 yes Figure 4 The enlarged view of point B in the middle; Figure 6 yes Figure 4 Enlarged view of point C in the middle; Figure 7 yes Figure 4 The enlarged view of point D in the middle; Figure 8 yes Figure 4 Enlarged view of point E in the middle; Fig. 9 It is a schematic diagram of the structure of the splint used in the present invention; Fig.10 yes Fig. 9 The enlarged view of F in the middle; In the figure: 1, kettle body; 11, discharge port; 12, dewatering barrel; 121, No. 1 connecting pipe; 13, drainage barrel; 131, drainage port; 132, No. 2 connecting pipe; 133, hydraulic push rod; 134, pipeline; 14, pressing plate; 141, filtrate port; 142, float valve; 143, filter cloth; 144, through groove; 145, No. 3 connecting pipe; 146, solenoid valve; 15, L-shaped block; 151, rectangular block; 152, rectangular groove; 153, fixing spring; 16, clamping plate; 161, lower bottom plate; 162, upper clamping ring; 163, Connecting hole; 164, expansion block; 165, fixing ring; 17, airway; 18, sealing plug; 181, connecting spring; 2, kettle cover; 21, stirring rod; 211, slot; 212, plug rod; 213, supporting spring; 214, electromagnetic sheet; 215, magnet; 216, air hole; 217, annular groove; 22, driving motor; 23, feed port; 24, swivel; 241, slot; 25, threaded groove; 26, corrugated airbag; 261, air inlet; 27, circular groove; 271, air cavity; 28, one-way valve; 29, cannula. DETAILED DESCRIPTION

[0016] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0017] like Figures 1 to 10 As shown, a petroleum drilling mud processing system according to the present invention comprises a dehydration kettle, wherein the dehydration kettle comprises: A kettle body 1, a kettle cover 2 is fixedly installed on the upper end of the kettle body 1; a stirring rod 21 is arranged inside the kettle body 1; the stirring rod 21 is rotatably connected to the kettle cover 2; a driving motor 22 is fixedly installed on the upper end of the kettle cover 2; the driving motor 22 is used to drive the stirring rod 21 to rotate; a feed inlet 23 is opened at the upper end of the kettle body 1; a discharge port 11 is opened at the lower end of the kettle body 1, A dehydration barrel 12, the dehydration barrel 12 is located inside the kettle body 1; the dehydration barrel 12 is fixedly installed at the lower end of the kettle body 1 through a hydraulic push rod 133; the stirring rod 21 is located inside the dehydration barrel 12; the dehydration barrel 12 is connected to the discharge port 11 through a No. 1 connecting pipe 121; a drainage barrel 13 is fixedly connected to the outer wall of the dehydration barrel 12; a drainage port 131 is provided at the bottom of the drainage barrel 13; a pipe 134 connected to the drainage port 131 is installed on the side wall of the kettle body 1; the drainage port 131 and the pipe 134 are connected through a No. 2 connecting pipe 132; The dewatering barrel 12 is internally connected with a pressing plate 14 in a sliding and sealing manner; a filtrate port 141 is provided on the surface of the pressing plate 14; a float valve 142 is slidably connected inside the filtrate port 141; a filter cloth 143 is fixedly installed on the side of the pressing plate 14 away from the kettle cover 2; the stirring rod 21 and the pressing plate 14 are rotatably and sealedly connected; a through groove 144 is provided on the upper end of the pressing plate 14; the through groove 144 is connected to the feed port 23 through a No. 3 connecting pipe 145; a solenoid valve 146 is fixedly installed inside the through groove 144, the discharge port 131 and the discharge port 11.

[0018] As an embodiment of the present invention, a rotating ring 24 is arranged between the stirring rod 21 and the pressure plate 14; the stirring rod 21 is slidingly and sealingly connected to the rotating ring 24; the rotating ring 24 is rotationally and sealedly connected to the pressure plate 14; a slot 211 is provided on the surface of the stirring rod 21; an insertion rod 212 is slidingly and sealingly connected in the slot 211; the insertion rod 212 is fixedly connected to the bottom of the slot 211 by a supporting spring 213; a slot 241 cooperating with the insertion rod 212 is provided on the inner ring wall of the rotating ring 24; an electromagnetic sheet 214 is inlaid at the bottom of the slot 211; a magnet 215 is inlaid at one end of the insertion rod 212 close to the bottom of the slot 211.

[0019] As an embodiment of the present invention, the upper end of the dehydration barrel 12 is rotatably connected with an L-shaped block 15; the inner wall of the dehydration barrel 12 is provided with a rectangular groove 152; a rectangular block 151 is slidably and sealably connected in the rectangular groove 152; the rectangular block 151 is connected to the bottom of the rectangular groove 152 via a fixing spring 153; During operation, the existing liquid extraction pipe is always located in the recovery mechanism, which causes the oil drilling mud to flow back from the lower end of the liquid extraction pipe into the interior of the liquid extraction pipe when the liquid level of the oil drilling mud is higher than the pipe port 134 at the lower end of the liquid extraction pipe. As a result, the oil drilling mud flowing back into the interior of the liquid extraction pipe cannot be effectively mixed with the flocculant, thereby reducing the de-oiling and dehydration effect of the technical solution on the mud. In this regard, the present invention arranges the drainage barrel 13 and the pressing plate 14 so that the pressing plate 14 can squeeze the upper petroleum-containing liquid and the middle water phase layer in the mud to flow to the top of the pressing plate 14 through the filtrate port 141, and then the pressing plate 14 pushes the upper petroleum-containing mixed liquid to rise, so that the mixed liquid flows into the drainage barrel 13 along the upper port of the dewatering barrel 12 and is discharged, thereby eliminating the need to use a suction pipe, preventing the oil drilling mud from flowing back into the inside of the suction pipe through the lower port of the suction pipe, so that the oil drilling mud in the dewatering barrel 12 can be fully combined with the flocculant, and the sludge in the mud can be quickly flocculated into a mass of floccules, thereby accelerating the efficiency of mud-water separation in the mud; thereby improving the treatment efficiency of the oil drilling mud; In the initial state, one end of the hydraulic push rod 133 is connected to the bottom of the kettle body 1, and the other end is connected to the lower end surface of the drainage barrel 13. The No. 1 connecting pipe 121, the No. 2 connecting pipe 132 and the No. 3 connecting pipe 145 are all corrugated pipes made of PTFE material. The hydraulic push rod 133 pushes the dehydration barrel 12 to rise to the maximum height, and the feed port 23 is connected to the external mud conveying system through the pipeline 134; the user uses a crane to lift the kettle cover 2 to the upper end of the kettle body 1. The drainage port 131 is away from the end of the No. 2 connecting pipe 132 and is connected to the outside through the pipeline 134; the kettle cover 2 drives the stirring rod 21 to enter the dehydration barrel 12 of the kettle body 1. Since the pressure plate 14 and the stirring rod 21 are connected by a rotating seal through the swivel 24, the stirring rod 21 pushes the pressure plate 1 through the swivel 24. 4 enters the dehydration barrel 12; since the inner wall of the dehydration barrel 12 is installed with a rectangular block 151, the rectangular block 151 can support the pressing plate 14; at this time, the user rotates the L-shaped block 15, so that the L-shaped block 15 rotates to the upper end surface of the pressing plate 14, so that the L-shaped block 15 blocks the upper end surface of the pressing plate 14; as the kettle cover 2 is continuously lowered, the kettle cover 2 drives the stirring rod 21 to continuously enter the dehydration barrel 12, because the stirring rod 21 and the pressing plate 14 are connected by a rotating ring 24; and the rotating ring 24 is connected to the pressing plate 14 in a rotating and sealing manner, and the stirring rod 21 is connected to the rotating ring 24 in a sliding and sealing manner, so in the process of the stirring rod 21 descending, the stirring rod 21 and the rotating ring 24 slide relative to each other until the kettle cover 2 covers the upper end of the kettle body 1, and the kettle cover 2 is fixed to the upper end of the kettle body 1 with bolts; Then the electromagnetic valve 146 in the through slot 144 is controlled to open, and the electromagnetic valve 146 in the discharge port 11 is closed, and then the external mud conveying system is controlled to convey the mud into the dewatering barrel 12 through the feed port 23, the No. 3 connecting pipe 145 and the through slot 144, and then flocculant is added to the dewatering barrel 12 through the feed port 23. When the mud and flocculant are added, the electromagnetic valve 146 in the through slot 144 is controlled to close, and at this time, the driving motor 22 is controlled to drive the stirring rod 21 to rotate; since the stirring rod 21 is rotatably connected to the pressing plate 14 through the rotating ring 24, During the rotation of the stirring rod 21, the stirring rod 21 drives the rotating ring 24 to rotate, so that the flocculant and the mud in the dewatering barrel 12 are fully mixed in the horizontal direction, so that the sludge in the mud is quickly flocculated into a mass of floccules, and the rotating ring 24 and the pressing plate 14 rotate relative to each other, so that the pressing plate 14 will not rotate driven by the stirring rod 21, so that the pressing plate 14 is in close contact with the inner wall of the dewatering barrel 12, so as to ensure the sealing performance of the interior of the dewatering barrel 12, and prevent the mud or petroleum-containing liquid in the dewatering barrel 12 from passing through the pressing plate 14 and the dewatering barrel 12. The overflow between the inner walls; ensure that the mud is fully flocculated in the dewatering barrel 12; during the rotation of the stirring rod 21, the hydraulic push rod 133 pushes the drainage barrel 13 fixed thereto to slide up and down in the kettle body 1. Since the drainage barrel 13 is fixedly connected to the outer wall of the dewatering barrel 12, the drainage barrel 13 can drive the dewatering barrel 12 to slide up and down synchronously in the kettle body 1; since the stirring rod 21 is connected to the kettle cover 2, and the stirring rod 21 is slidably sealed with the rotating ring 24, the pressing plate 14 drives the rotating ring 24 along the stirring rod 2 in the process of the dewatering barrel 12 driving the pressing plate 14 to move up and down. 1 slides up and down, so that the stirring rod 21 moves up and down in the dewatering barrel 12; the rotating stirring rod 21 can accelerate the vertical mixing of the mud and flocculant in the dewatering barrel 12, so that the sludge in the mud and the flocculant are fully contacted and form floccules, and the formed floccules sink to the bottom of the dewatering barrel 12 under the action of their own gravity; since the density of oil is less than that of water, the liquid containing oil floats to the upper layer, and at this time, the materials in the dewatering barrel 12 are respectively the upper layer of oil-containing liquid, the middle water phase layer and the lower layer of solid sediment from top to bottom; When it is necessary to discharge the upper layer of petroleum-containing liquid and the middle water phase layer, the user controls the hydraulic push rod 133 to drive the dehydration barrel 12 to the lowest height through the liquid discharge barrel 13. At this time, the dehydration barrel 12 drives the rotating ring 24 to the slot 211 through the pressure plate 14. At this time, the insertion rod 212 is directly opposite to the card slot 241, and the electromagnetic sheet 214 is controlled to be energized so that the electromagnetic sheet 214 can generate the same magnetic pole as the magnet 215, so that the magnet 215 drives the insertion rod 212 to stretch the support spring 213 out of the slot 211 under the impetus of the magnetic repulsion, so that the insertion rod 212 extending out of the slot 211 can enter the card slot 241, so that the insertion rod 2 12 connects the stirring rod 21 with the rotating ring 24, and then controls the hydraulic push rod 133 to push the drain barrel 13 up, so that the drain barrel 13 drives the dehydration barrel 12 to rise, so that the stirring rod 21 descends relative to the dehydration barrel 12, so that the stirring rod 21 pushes the pressing plate 14 down through the rotating ring 24 connected thereto, so that the pressing plate 14 generates an extrusion force on the rectangular block 151 at the lower end; because the upper end of the rectangular block 151 is set as an inclined surface, that is, the pressing plate 14 contacts the inclined end of the rectangular block 151, so that the pressing plate 14 generates a component force toward the rectangular groove 152 on the rectangular block 151 through the inclined end of the rectangular block 151, so that the rectangular block 151 is in The pressing plate 14 pushes the fixed spring 153 to enter the rectangular groove 152, and the pressing plate 14 is in sliding contact with the rectangular block 151. When the stirring rod 21 pushes the pressing plate 14 over the rectangular block 151 through the rotating ring 24, the pressing plate 14 keeps approaching the upper liquid surface in the dehydration barrel 12 until the pressing plate 14 contacts the liquid in the dehydration barrel 12, so that the liquid is squeezed by the pressing plate 14. At this time, the liquid will enter the filtrate port 141, so that the liquid pushes the float valve 142 in the filtrate port 141 to rise, so that the filtrate port 141 is opened. At this time, the petroleum-containing liquid passes through the filtrate port 141 to the upper end surface of the pressing plate 14. Since the intermediate water phase contains There are tiny floccules, and these tiny floccules can effectively promote the aggregation of solid particles in the water phase layer to form larger sediment agglomerates; if these tiny floccules are extracted with the water phase layer, the solid particles in the water phase layer cannot be effectively aggregated and precipitated, resulting in reduced dehydration efficiency; and these tiny floccules will increase the difficulty of subsequent treatment of the water phase layer and petroleum-containing liquids. For this, the filter cloth 143 is fixedly connected to the lower end surface of the pressing plate 14, so that the filter cloth 143 can block and filter the tiny floccules in the water phase layer, so that only liquid can pass through the filter cloth 143 and reach the upper end of the pressing plate 14 through the filtrate port 141;When the filter cloth 143 contacts the lower solid sediment, the pressing plate 14 descends the most, and the upper petroleum-containing liquid and the middle water phase layer in the dewatering barrel 12 pass through the filtrate port 141 to the upper end surface of the pressing plate 14. At this time, the hydraulic push rod 133 is controlled to contract, so that the hydraulic push rod 133 drives the dewatering barrel 12 to descend through the liquid discharge barrel 13, so that the pressing plate 14 rises relative to the dewatering barrel 12, so that the pressing plate 14 pushes the upper petroleum-containing liquid and the water phase layer to rise. At this time, the float valve 142 is no longer pushed by the liquid below, so that the float valve 142 falls into the filtrate port 141 under the action of its own gravity. At this time, the filtrate port 141 is blocked by the float valve 142, so when the pressing plate 14 pushes When the petroleum-containing liquid and the water phase layer rise, the petroleum-containing liquid and the water phase layer will not flow into the dewatering barrel 12 from the filtrate port 141. At this time, the petroleum-containing liquid and the water phase layer pushed by the pressing plate 14 will overflow from the barrel port of the dewatering barrel 12, so that the overflowed petroleum-containing liquid and the water phase layer flow into the drainage barrel 13. After the petroleum-containing liquid and the water phase layer flowing into the drainage barrel 13 are placed and layered, the electromagnetic valve 146 in the drainage port 131 is controlled to open, so that the layered petroleum-containing liquid and the water phase layer are discharged and collected in sequence through the drainage port 131, and then the discharged petroleum-containing liquid and the water phase layer are processed respectively, which reduces the subsequent separation steps of the petroleum-containing liquid and the water phase layer, thereby reducing The difficulty of treating the oil-containing liquid and water phase layer is improved, and the overall treatment efficiency of the oil drilling mud is improved; since the upper end surface of the pressure plate 14 is set as an inclined surface, when the pressure plate 14 rises to the rectangular block 151, the pressure plate 14 pushes the rectangular block 151 into the rectangular groove 152 through the inclined surface of the upper end surface, so that the pressure plate 14 slides and rises relative to the rectangular block 151 until the pressure plate 14 passes over the rectangular block 151. At this time, the rectangular block 151 is reset under the push of the restoring force of the fixed spring 153. At this time, the pressure plate 14 is stabilized again between the L-shaped block 15 and the rectangular block 151, so as to facilitate the next mud dehydration, and there is no need to use a suction pipe to extract the oil-containing liquid and water phase layer , avoiding the problem of clogging of the liquid extraction pipe, ensuring that the petroleum-containing liquid and the liquid in the water phase layer in the slurry can be quickly and effectively discharged; through the combined use of the dehydration kettle and the flocculant, the dehydration effect of the dehydration kettle on the sludge is greatly improved; the mud-water separation efficiency in the sludge is improved; and thus the treatment efficiency of the oil drilling mud of the present invention is improved; for the sludge flocs deposited at the bottom of the dehydration barrel 12, after the petroleum-containing liquid and the water phase layer are discharged, the discharge port 11 is opened, so that the sludge flocs deposited at the bottom of the dehydration barrel 12 are discharged and collected through the discharge port 11, and the collected sludge flocs need to be transported to the filter press process for further dehydration treatment. ;

[0020] As an embodiment of the present invention, a thread groove 25 is formed on a side of the pressing plate 14 away from the kettle cover 2 ; a clamping plate 16 is rotatably connected in the thread groove 25 ; and the clamping plate 16 is used to clamp the filter cloth 143 .

[0021] As an embodiment of the present invention, the clamping plate 16 includes a lower base plate 161 and an upper snap ring 162; the upper snap ring 162 is threadedly connected to the lower base plate 161; the upper snap ring 162 is threadedly connected in the thread groove 25; a connecting hole 163 is provided on the upper end surface of the lower base plate 161; an expansion block 164 is slidably and sealably connected in the connecting hole 163; a fixing ring 165 is provided above the lower base plate 161; the expansion block 164 is fixedly connected to the lower end surface of the fixing ring 165; During operation, as the filter cloth 143 is used for a long time, tiny flocs will clog the filter holes of the filter cloth 143, thereby affecting the filtering effect of the filter cloth 143. In this regard, the filter cloth 143 is detachable and replaceable, so that the filter cloth 143 can be replaced regularly to prevent the filter holes of the filter cloth 143 from being clogged and affecting the filtering effect of the filter cloth 143. This ensures that the liquid in the mud can quickly pass through the filtrate port 141, accelerates the discharge speed of the liquid in the mud, and thus accelerates the dehydration efficiency of the mud of the present invention. Moreover, the filter cloth 143 is replaced and washed regularly, which can reduce the amount of tiny flocs and dirt. The time of contact with the filter cloth 143 is reduced, and the wear and corrosion caused by the tiny flocculants and dirt on the filter cloth 143 is reduced, thereby increasing the service life of the filter cloth 143; in the initial state, the expansion blocks 164 are provided in multiple groups, and the number of expansion blocks 164 in each group is set to three. The three expansion blocks 164 are provided with threads on the sides close to each other, and the filter cloth 143 is provided with a circular hole facing the connecting hole 163. The user first lays the filter cloth 143 flat on the lower bottom plate 161 so that the circular hole on the surface of the filter cloth 143 faces the connecting hole 163 of the lower bottom plate 161, and then places the fixing ring 165 on the filter cloth 143. The expansion block 164 at the lower end of the fixing ring 165 is inserted into the connection hole 163 of the lower bottom plate 161 through the round hole on the surface of the filter cloth 143. At this time, the user uses a screw to insert the connection hole 163 from the end of the lower bottom plate 161 away from the filter cloth 143, so that the screw is threadedly connected with the expansion block 164, so that the three adjacent expansion blocks 164 are opened in a direction away from each other under the pressure of the screw, so that the expansion block 164 contacts and presses against the inner wall of the connection hole 163, so that the fixing ring 165 is fixed to the lower bottom plate 161 and the filter cloth 143 is clamped on the lower bottom plate 161. 61, at this time, the upper snap ring 162 is used to make the upper snap ring 162 threadedly connected to the lower base plate 161; since the filter cloth 143 is arranged in a ring shape, the outer circle edge and the inner circle edge of the filter cloth 143 are fixed to the upper end of the lower base plate 161 by using two upper snap rings 162. At this time, the filter cloth 143 is tightly laid on the lower base plate 161, and the user aligns the upper snap ring 162 with the thread groove 25 so that the upper snap ring 162 is threadedly connected in the thread groove 25, thereby making the filter cloth 143 fixed on the lower base plate 161 threadedly connected to the lower end surface of the pressing plate 14 through the upper snap ring 162.

[0022] As an embodiment of the present invention, a corrugated airbag 26 is arranged inside the kettle body 1; an air inlet 261 connected to an external delivery pump is provided on the surface of the corrugated airbag 26; the external delivery pump is used to deliver flocculant; one end of the corrugated airbag 26 is fixedly connected to the drainage bucket 13, and the other end is fixedly connected to the inner wall of the kettle body 1; an air channel 17 is provided inside the kettle body 1; one end of the air channel 17 is connected to the corrugated airbag 26, and the other end passes through the upper end surface of the kettle body 1; a circular groove 27 is provided on the lower end surface of the kettle cover 2; the stirring rod 21 The rotary seal is connected in the circular groove 27; the lower end surface of the stirring rod 21 is provided with an air hole 216; the surface of the stirring rod 21 is provided with an annular groove 217; the end of the stirring rod 21 with the annular groove 217 is located in the circular groove 27; the air hole 216 is connected with the circular groove 27 through the annular groove 217; the lower end surface of the kettle cover 2 is provided with an air cavity 271 facing the airway 17; the end of the air cavity 271 away from the airway 17 is connected with the circular groove 27; the air inlet 261 and the air hole 216 are fixedly installed with a one-way valve 28.

[0023] As an embodiment of the present invention, one end of the air cavity 271 away from the circular groove 27 is threadedly connected with a cannula 29 ; one end of the cannula 29 away from the air cavity 271 is slidably and sealingly connected in the airway 17 .

[0024] As an embodiment of the present invention, the end of the airway 17 away from the corrugated airbag 26 is slidably sealed and connected with a sealing plug 18; the sealing plug 18 is connected to the inner wall of the airway 17 via a connecting spring 181; the cross-sectional shape of the cannula 29 is set to be trapezoidal; During operation, when the user covers the kettle cover 2 on the upper end of the kettle body 1, the user needs to control the cannula 29 at the lower end of the kettle cover 2 to face the port of the airway 17 at the upper end of the kettle body 1, so that the cannula 29 is inserted into the airway 17; since the port of the airway 17 is installed with a sealing plug 18, when the cannula 29 is inserted into the airway 17, the cannula 29 will push the sealing plug 18 in the airway 17 to squeeze the connecting spring 181 into the inside of the airway 17, and at this time, the cannula 29 is slidably sealed and connected in the airway 17, because the cross-sectional shape of the cannula 29 is set to be a trapezoid, and the cannula 29 is connected with the air cavity 271, so that the lower end surface of the cannula 29 will not be blocked by the sealing plug 18, thereby ensuring that the cannula 29 can connect the air cavity 271 with the airway 17; In the initial state, the flocculant is added to the kettle body 1 through the feed port 23, which may easily lead to the flocculant being unable to be fully mixed with the mud at the bottom of the kettle body 1; in this regard, an air inlet 261 of the corrugated airbag 26 is provided to penetrate the kettle body 1 through an air pipe and connect to an external delivery pump, and the user uses the delivery pump to add flocculant to the corrugated airbag 26; when the hydraulic push rod 133 pushes the drainage barrel 13 to slide up and down, the drainage barrel 13 will squeeze the corrugated airbag 26 below it, so that the flocculant in the corrugated airbag 26 enters the air cavity 271 through the airway 17 and the cannula 29, so that the flocculant entering the air cavity 271 can enter the circular groove 27, so that the flocculant in the circular groove 27 enters the air hole 216 through the annular groove 217 on the surface of the stirring rod 21 , so that the flocculant entering the air hole 216 is sprayed out through the end of the stirring rod 21 away from the kettle cover 2. Since the stirring rod 21 moves upward relative to the kettle body 1 at this time, and is driven by the driving motor 22 to rotate, the sprayed flocculant can rotate in the vertical direction and fully mix with the mud, thereby improving the mixing effect of the flocculant and the mud, ensuring that the mud at the bottom of the kettle body 1 can also be fully mixed with the flocculant, and accelerating the flocculation efficiency of the sludge in the mud; when the hydraulic push rod 133 pushes the drainage barrel 13 to rise, the drainage barrel 13 will pull the corrugated airbag 26 to extend. In order to prevent the mud from flowing back into the corrugated airbag 26 through the air hole 216, a one-way valve 28 is installed in the air hole 216, so that the one-way valve 28 The air hole 216 can block the slurry from flowing back, and the one-way valve 28 is installed in the air inlet 261 to prevent the corrugated airbag 26 from being squeezed and causing the flocculant to spray out through the air inlet 261, thereby ensuring that the flocculant can effectively flow into the dewatering barrel 12 from the air hole 216 to ensure that the flocculant can be fully mixed with the mud, thereby improving the flocculation effect of the mud; when the flocculant is completely discharged into the dewatering barrel 12, the delivery pump is controlled to deliver air into the corrugated airbag 26, so that the gas in the corrugated airbag 26 is continuously filled into the mud through the air hole 216 in the form of bubbles, so that the bubbles can drive the mud to flow during the rising process, so as to promote the mixing and contact between the flocculant and the sludge particles, thereby improving the flocculation effect;Because bubbles disturb the mud during the rising process, the oil droplets are more likely to contact with the bubbles, and the interface between the oil and the bubbles has a relatively low interfacial tension, so the oil droplets can more easily adhere to the surface of the bubbles. Therefore, when the bubbles rise, the bubbles will capture and drive the oil-containing droplets attached to their surface to rise, thereby improving the separation efficiency of the oil-containing liquid, thereby improving the deoiling effect of the mud, and further improving the practicality of the present invention. ;

[0025] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0026] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A petroleum drilling mud processing system, comprising a dehydration kettle, wherein the dehydration kettle comprises: A kettle body (1), wherein a kettle cover (2) is fixedly mounted on the upper end of the kettle body (1); a stirring rod (21) is arranged inside the kettle body (1); the stirring rod (21) is rotatably connected to the kettle cover (2); a driving motor (22) is fixedly mounted on the upper end of the kettle cover (2); the driving motor (22) is used to drive the stirring rod (21) to rotate; a feed inlet (23) is provided at the upper end of the kettle body (1); a discharge outlet (11) is provided at the lower end of the kettle body (1), characterized in that: A dewatering barrel (12), the dewatering barrel (12) being located inside the kettle body (1); the dewatering barrel (12) being fixedly mounted on the lower end of the kettle body (1) via a hydraulic push rod (133); the stirring rod (21) being located inside the dewatering barrel (12); the dewatering barrel (12) being connected to the discharge port (11) via a No. 1 connecting pipe (121); a drainage barrel (13) being fixedly mounted on the outer wall of the dewatering barrel (12); a drainage port (131) being provided at the bottom of the drainage barrel (13); a pipe (134) being connected to the drainage port (131) being mounted on the side wall of the kettle body (1); the drainage port (131) and the pipe (134) being connected via a No. 2 connecting pipe (132) The dewatering barrel (12) is internally slidably sealed with a pressing plate (14); a filtrate port (141) is provided on the surface of the pressing plate (14); a float valve (142) is slidably connected inside the filtrate port (141); a filter cloth (143) is fixedly installed on the side of the pressing plate (14) away from the kettle cover (2); the stirring rod (21) and the pressing plate (14) are rotatably sealed; a through groove (144) is provided at the upper end of the pressing plate (14); the through groove (144) and the feed port (23) are connected via a No. 3 connecting pipe (145); solenoid valves (146) are fixedly installed inside the through groove (144), the discharge port (131) and the discharge port (11).

2. A petroleum drilling mud processing system according to claim 1, characterized in that: A rotating ring (24) is provided between the stirring rod (21) and the pressing plate (14); the stirring rod (21) and the rotating ring (24) are connected in a sliding and sealing manner; the rotating ring (24) and the pressing plate (14) are connected in a rotating and sealing manner; a slot (211) is provided on the surface of the stirring rod (21); an insertion rod (212) is connected in a sliding and sealing manner in the slot (211); the insertion rod (212) and the bottom of the slot (211) are fixedly connected via a supporting spring (213); a clamping groove (241) matching with the insertion rod (212) is provided on the inner ring wall of the rotating ring (24); an electromagnetic sheet (214) is embedded in the bottom of the slot (211); and a magnet (215) is embedded at one end of the insertion rod (212) close to the bottom of the slot (211).

3. A petroleum drilling mud processing system according to claim 2, characterized in that: The upper end of the dehydration barrel (12) is rotatably connected to an L-shaped block (15); the inner wall of the dehydration barrel (12) is provided with a rectangular groove (152); a rectangular block (151) is slidably and sealingly connected in the rectangular groove (152); the rectangular block (151) is connected to the bottom of the rectangular groove (152) via a fixing spring (153).

4. A petroleum drilling mud processing system according to claim 3, characterized in that: A threaded groove (25) is provided on a side of the pressing plate (14) away from the kettle cover (2); a clamping plate (16) is rotatably connected in the threaded groove (25); and the clamping plate (16) is used to clamp the filter cloth (143).

5. A petroleum drilling mud processing system according to claim 4, characterized in that: The clamping plate (16) comprises a lower base plate (161) and an upper retaining ring (162); the upper retaining ring (162) is threadedly connected to the lower base plate (161); the upper retaining ring (162) is threadedly connected in the thread groove (25); a connecting hole (163) is provided on the upper end surface of the lower base plate (161); an expansion block (164) is slidingly and sealingly connected in the connecting hole (163); a fixing ring (165) is provided above the lower base plate (161); the expansion block (164) is fixedly connected to the lower end surface of the fixing ring (165).

6. A petroleum drilling mud processing system according to claim 5, characterized in that: The kettle body (1) is provided with a corrugated airbag (26); the surface of the corrugated airbag (26) is provided with an air inlet (261) connected to an external delivery pump; the external delivery pump is used to deliver flocculant; one end of the corrugated airbag (26) is fixedly connected to the drainage bucket (13), and the other end is fixedly connected to the inner wall of the kettle body (1); an air passage (17) is provided inside the kettle body (1); one end of the air passage (17) is connected to the corrugated airbag (26), and the other end passes through the upper end surface of the kettle body (1); a circular groove (27) is provided on the lower end surface of the kettle cover (2); the stirring rod (21) is rotatably sealed and connected to the circular groove (2 7); an air hole (216) is provided on the lower end surface of the stirring rod (21); an annular groove (217) is provided on the surface of the stirring rod (21); one end of the stirring rod (21) having the annular groove (217) is located in the circular groove (27); the air hole (216) is communicated with the circular groove (27) through the annular groove (217); an air cavity (271) facing the air passage (17) is provided on the lower end surface of the kettle cover (2); one end of the air cavity (271) away from the air passage (17) is communicated with the circular groove (27); and a one-way valve (28) is fixedly installed in both the air inlet (261) and the air hole (216).

7. The oil drilling mud processing system according to claim 5, characterized in that: One end of the air cavity (271) away from the circular groove (27) is threadedly connected to a cannula (29); and one end of the cannula (29) away from the air cavity (271) is slidably and sealingly connected in the airway (17).

8. The oil drilling mud processing system according to claim 7, characterized in that: The end of the airway (17) away from the corrugated airbag (26) is slidably sealed with a sealing plug (18); the sealing plug (18) is connected to the inner wall of the airway (17) via a connecting spring (181); and the cross-sectional shape of the cannula (29) is set to be a trapezoid.

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